Keijo Hämäläinen

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  1. The isotropic Compton profile difference across the phase transition of VO2

    Ruotsalainen, K. O., Inkinen, J., Pylkkänen, T., Buslaps, T., Hakala, M., Hämäläinen, K. & Huotari, S., 3 Oct 2018, In : European Physical Journal B. Condensed Matter and Complex Systems. 91, 10, 6 p., 225.

    Research output: Contribution to journalArticleScientificpeer-review

  2. Multiresolution Parameter Choice Method for Total Variation Regularized Tomography

    Niinimäki, K., Lassas, M., Hämäläinen, K., Kallonen, A., Kolehmainen, V., Niemi, E. & Siltanen, S., 2016, In : SIAM journal on imaging sciences . 9, 3, p. 938-974 37 p.

    Research output: Contribution to journalArticleScientificpeer-review

  3. Resonant X-ray emission with a standing wave excitation

    Ruotsalainen, K. O., Honkanen, A-P., Collins, S. P., Monaco, G., Moretti Sala, M., Krisch, M., Hämäläinen, K., Hakala, M. & Huotari, S., 3 Mar 2016, In : Scientific Reports. 6, 5 p., 22648 .

    Research output: Contribution to journalArticleScientificpeer-review

  4. Inelastic x-ray scattering in heterostructures: electronic excitations in LaAlO3/SrTiO3

    Ruotsalainen, K. O., Sahle, C. J., Ritschel, T., Geck, J., Hosoda, M., Bell, C., Hikita, Y., Hwang, H., Fister, T., Gordon, R. A., Hämäläinen, K., Hakala, M. & Huotari, S., 29 Jul 2015, In : Journal of Physics. Condensed Matter. 27, 33, 10 p., 335501.

    Research output: Contribution to journalArticleScientificpeer-review

  5. Dynamic multi-source X-ray tomography using a spacetime level set method

    Niemi, E., Lassas, M., Kallonen, A., Harhanen, L., Hamalainen, K. & Siltanen, S., 15 Jun 2015, In : Journal of Computational Physics. 291, p. 218-237 20 p.

    Research output: Contribution to journalArticleScientificpeer-review

  6. Intra- and intermolecular effects on the Compton profile of the ionic liquid 1,3-dimethylimidazolium chloride

    Koskelo, J., Juurinen, I., Ruotsalainen, K. O., McGrath, M. J., Kuo, I-F., Lehtola, S., Galambosi, S., Hämäläinen, K., Huotari, S. & Hakala, M., 28 Dec 2014, In : Journal of Chemical Physics. 141, 24, 6 p., 244505.

    Research output: Contribution to journalArticleScientificpeer-review

  7. Total variation regularization for large-scale X-ray tomography

    Hämäläinen, K., Harhanen, L., Hauptmann, A., Kallonen, A., Niemi, E. & Siltanen, S., 2014, In : International Journal of Tomography and Simulation. 25, 1, p. 1-25

    Research output: Contribution to journalArticleScientificpeer-review

  8. The origin and loss of periodic patterning in the turtle shell

    Moustakas-Verho, J. E., Zimm, R., Cebra-Thomas, J., Lempiainen, N. K., Kallonen, A., Mitchell, K. L., Hämäläinen, K., Salazar Ciudad, I., Jernvall, J. & Gilbert, S. F., Aug 2014, In : Development. 141, 15, p. 3033-3039 7 p.

    Research output: Contribution to journalArticleScientificpeer-review

  9. Molecular-Level Changes of Aqueous Poly(N-isopropylacrylamide) in Phase Transition

    Juurinen, I., Galambosi, S., Anghelescu-Hakala, A. G., Koskelo, J., Honkimaki, V., Hamalainen, K., Huotari, S. & Hakala, M. O., 22 May 2014, In : Journal of Physical Chemistry B. 118, 20, p. 5518-5523 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  10. Electrode thickness measurement of a Si(Li) detector for the SIXA array

    Tikkanen, T., Hämäläinen, K. & Huotari, S., 1 Feb 1998, In : Nuclear Instruments & Methods in Physics Research. Section A: Accelerators, Spectrometers, Detectors, and Associated Equipment. 403, 2-3, p. 425-430 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  11. Resonant inelastic x-ray scattering from strongly correlated copper oxides

    Hill, JP., Kao, CC., Von Zimmermann, M., Hämäläinen, K., Huotari, S., Berman, LE., Caliebe, WAL., Hirota, K., Matsubara, M., Kotani, A., Peng, JL., Greene, RL., Tsukada, I., Masuda, T. & Uchinokura, K., 1999, In : Japanese journal of applied physics part 1-Regular papers short notes & review papers. 38, p. 118-121 4 p.

    Research output: Contribution to journalArticleScientificpeer-review

  12. Effect of the Hydrophobic Alcohol Chain Length on the Hydrogen-Bond Network of Water

    Juurinen, I., Pylkkänen, T., Sahle, C., Simonelli, L., Hämäläinen, K., Huotari, S. & Hakala, M. O., 24 Jul 2014, In : Journal of Physical Chemistry B. 118, 29, p. 8750-8755 6 p.

    Research output: Contribution to journalArticleScientificpeer-review

  13. High-Pressure Compton Scattering

    Huotari, S., Hämäläinen, K., Laukkanen, J. K., Soininen, A., Manninen, S., Kao, C-C., Buslaps, T., Mezour, M. & Mao, H-K., 2000, Science and Technology of High Pressure: Proceedings of AIRAPT-17. Manghnani, M., Nellis, W. & Nicol, M. (eds.). Universities Press, Vol. 1. p. 1017-1020 4 p.

    Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review

  14. Energy and polarization dependence of resonant inelastic X-ray scattering in Nd2CuO4

    Hill, JP., Kao, CC., Hämäläinen, K., Huotari, S., Berman, LE., Caliebe, WAL., Matsubara, M., Kotani, A., Peng, JL. & Greene, RL., Mar 2000, In : Journal of Physics and Chemistry of Solids. 61, 3, p. 425-429 5 p.

    Research output: Contribution to journalArticleScientificpeer-review

  15. The L alpha satellite of tungsten

    Diamant, R., Huotari, S., Hämäläinen, K., Sharon, R., Kao, CC. & Deutsch, M., 28 Sep 2000, In : Journal of Physics. B, Atomic, Molecular and Optical Physics. 33, 18, p. L649-L653 5 p.

    Research output: Contribution to journalArticleScientificpeer-review

  16. Cu Kh alpha(1,2) hypersatellites: Suprathreshold evolution of a hollow-atom x-ray spectrum

    Diamant, R., Huotari, S., Hämäläinen, K., Kao, CC. & Deutsch, M., Nov 2000, In : Physical Review A (Atomic, Molecular and Optical Physics). 62, 5, 14 p., 052519.

    Research output: Contribution to journalArticleScientificpeer-review

  17. Polarization and momentum dependence of a charge-transfer excitation in Nd2CuO4

    Hämäläinen, K., Hill, JP., Huotari, S., Kao, CC., Berman, LE., Kotani, A., Ide, T., Peng, JL. & Greene, RL., 15 Jan 2000, In : Physical Review B, Condensed Matter and Materials Physics. 61, 3, p. 1836-1840 5 p.

    Research output: Contribution to journalArticleScientificpeer-review

  18. Free electron gas under high pressure

    Hämäläinen, K., Huotari, S., Laukkanen, J., Soininen, A., Manninen, S., Kao, CC., Buslaps, T. & Mezouar, M., 1 Jul 2000, In : Physical Review B, Condensed Matter and Materials Physics. 62, 2, p. R735-R738 4 p.

    Research output: Contribution to journalArticleScientificpeer-review

  19. Energy dependence of experimental Be Compton profiles

    Huotari, S., Hämäläinen, K., Manninen, S., Kaprzyk, S., Bansil, A., Caliebe, W., Buslaps, T., Honkimaki, V. & Suortti, P., 15 Sep 2000, In : Physical Review B, Condensed Matter and Materials Physics. 62, 12, p. 7956-7963 8 p.

    Research output: Contribution to journalArticleScientificpeer-review

  20. Evolution from threshold of a hollow atom's X-ray emission spectrum: The CuKh alpha(1,2) hypersatellites

    Diamant, R., Huotari, S., Hämäläinen, K., Kao, CC. & Deutsch, M., 10 Apr 2000, In : Physical Review Letters. 84, 15, p. 3278-3281 4 p.

    Research output: Contribution to journalArticleScientificpeer-review

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